#include <stdio.h>

int Add(int num1, int num2)
{
  int sum, carry;
  do
  {
    sum = num1 ^ num2;
    carry = (num1 & num2) << 1;

    num1 = sum;
    num2 = carry;
  }
  while(num2 != 0);

  return num1;
}